S.C. Code Ann. § 31-21-150

Before accepting any complaint under this chapter, the commission shall determine if the complainant has filed a similar complaint with the Federal Home Loan Bank Board, the Comptroller of the Currency, the Federal Deposit Insurance Corporation of the Federal Reserve System, the United States Department of Housing and Urban Development, or any other agency with authority to investigate and resolve complaints alleging a violation of this chapter. If a complaint has been filed or is filed, subsequently the commission shall coordinate efforts to resolve the complaint with that agency in order to avoid multiple investigations of the respondent.